Search Results - "Mokhtari, Parham"

Acoustic analysis of the vocal tract during vowel production by finite-difference time-domain method by Takemoto, Hironori, Mokhtari, Parham, Kitamura, Tatsuya

“…The vocal tract shape is three-dimensionally complex. For accurate acoustic analysis, a finite-difference time-domain method was introduced in the present…”
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Frequency and amplitude estimation of the first peak of head-related transfer functions from individual pinna anthropometry by Mokhtari, Parham, Takemoto, Hironori, Nishimura, Ryouichi, Kato, Hiroaki

“…The first (lowest) peak of head-related transfer functions (HRTFs) is known to be a concha depth resonance and a spectral cue in human sound localization…”
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Mechanism for generating peaks and notches of head-related transfer functions in the median plane by TAKEMOTO, Hironori, MOKHTARI, Parham, KATO, Hiroaki, NISHIMURA, Ryouichi, LIDA, Kazuhiro

“…It has been suggested that the first spectral peak and the first two spectral notches of head-related transfer functions (HRTFs) are cues for sound…”
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Vertical normal modes of human ears: Individual variation and frequency estimation from pinna anthropometry by Mokhtari, Parham, Takemoto, Hironori, Nishimura, Ryouichi, Kato, Hiroaki

“…Beyond the first peak of head-related transfer functions or pinna-related transfer functions (PRTFs) human pinnae are known to have two normal modes with…”
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Further observations on a principal components analysis of head-related transfer functions by Mokhtari, Parham, Kato, Hiroaki, Takemoto, Hironori, Nishimura, Ryouichi, Enomoto, Seigo, Adachi, Seiji, Kitamura, Tatsuya

“…Humans can externalise and localise sound-sources in three-dimensional (3D) space because approaching sound waves interact with the head and external ears,…”
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Acoustic interaction between the right and left piriform fossae in generating spectral dips by Takemoto, Hironori, Adachi, Seiji, Mokhtari, Parham, Kitamura, Tatsuya

“…It is known that the right and left piriform fossae generate two deep dips on speech spectra and that acoustic interaction exists in generating the dips: if…”
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mGlif: A software tool for manual glottal inverse filtering by Mokhtari, Parham

“…Despite decades of advances in automated estimation of the voice source (glottal flow) from the speech signal, manual glottal inverse filtering remains the…”
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Acoustic roles of the laryngeal cavity in vocal tract resonance by Takemoto, Hironori, Adachi, Seiji, Kitamura, Tatsuya, Mokhtari, Parham, Honda, Kiyoshi

“…The acoustic effects of the laryngeal cavity on the vocal tract resonance were investigated by using vocal tract area functions for the five Japanese vowels…”
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Optimum Loss Factor for a Perfectly Matched Layer in Finite-Difference Time-Domain Acoustic Simulation by Mokhtari, Parham, Takemoto, Hironori, Nishimura, Ryouichi, Kato, Hiroaki

“…A perfectly matched layer (PML) is commonly used in finite-difference time-domain (FDTD) simulation to absorb outgoing waves and thereby reduce artifactual…”
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Principal components of vocal-tract area functions and inversion of vowels by linear regression of cepstrum coefficients by Mokhtari, Parham, Kitamura, Tatsuya, Takemoto, Hironori, Honda, Kiyoshi

“…This paper addresses the following two hypotheses: (i) vocal-tract area functions of Japanese vowels can be accurately represented by a linear combination of…”
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Vocal tract length perturbation and its application to male-female vocal tract shape conversion by Adachi, Seiji, Takemoto, Hironori, Kitamura, Tatsuya, Mokhtari, Parham, Honda, Kiyoshi

“…An alternative and complete derivation of the vocal tract length sensitivity function, which is an equation for finding a change in formant frequency due to…”
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Cyclicity of laryngeal cavity resonance due to vocal fold vibration by Kitamura, Tatsuya, Takemoto, Hironori, Adachi, Seiji, Mokhtari, Parham, Honda, Kiyoshi

“…Acoustic effects of the time-varying glottal area due to vocal fold vibration on the laryngeal cavity resonance were investigated based on vocal tract area…”
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Effects of visual stimuli on auditory separation of sound images spatially split by synthesized binaural signal by Morikawa, Daisuke, Sakai, Tsubasa, Mokhtari, Parham

“…In order to clarify the effect of visual stimuli on the spatially split perception of sound images by interaural differences, we conducted spatially split…”
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An MRI-based time-domain speech synthesis system by Kitamura, Tatsuya, Takemoto, Hironori, Mokhtari, Parham, Hirai, Toshio

“…A speech synthesis system was developed based on Maedas method [S. Maeda, Speech Commun. 1, 199–229 (1982)], which simulates acoustic wave propagation in the…”
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Speaker Identifying Apparatus And Computer Program Product by Mokhtari, Parham

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The effect of head rotation on monaural sound-image localization in the horizontal plane by Hirahara, Tatsuya, Kojima, Daiki, Morikawa, Daisuke, Mokhtari, Parham

“…Spectral cues (SCs) formed by the pinna are known to be essential for sound externalization, and accurate localization of sound-source azimuth and elevation in…”
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Estimation of the glottal flow from speech pressure signals: Evaluation of three variants of iterative adaptive inverse filtering using computational physical modelling of voice production by Mokhtari, Parham, Story, Brad, Alku, Paavo, Ando, Hiroshi

“…The aim of this study is to comparatively review and evaluate three variants of the glottal inverse filtering algorithm based on iterative adaptive inverse…”
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A dipole model for estimating frequency versus elevation-angle trajectory of the first spectral notch of head-related transfer functions in the median plane by Takemoto, Hironori, Mokhtari, Parham, Kato, Hiroaki, Nishimura, Ryouichi, Iida, Kazuhiro

“…The first (lowest) spectral notch (N1) of head-related transfer functions is known as a cue for sound localization in the median plane. This may be due to the…”
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Apparatus And Method For Extracting Syllabic Nuclei by Campbell, Nick, Mokhtari, Parham

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Direct computational method of including piriform fossae and nasal cavity in a time-domain acoustic model of the vocal tract by Mokhtari, Parham

“…Frequency-domain simulations of the human vocal tract (VT) have previously shown the importance of including the piriform fossae, which impart a pole and two…”
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